From: Sage Weil <sage@newdream.net>
Date: Tue, 25 Jan 2011 16:17:48 +0000 (-0800)
Subject: libceph: fix socket read error handling
X-Git-Tag: v2.6.38-rc6~10^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98bdb0aa007ff7e8e0061936d8d0e210faf2e655;p=pandora-kernel.git

libceph: fix socket read error handling

If we get EAGAIN when trying to read from the socket, it is not an error.
Return 0 from the helper in this case to simplify the error handling cases
in the caller (indirectly, try_read).

Fix try_read to pass any error to it's caller (con_work) instead of almost
always returning 0.  This let's us respond to things like socket
disconnects.

Signed-off-by: Sage Weil <sage@newdream.net>
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